Cisco IOS ISDN Voice Configuration Guide Cisco IOS Release 12.4

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Cisco IOS ISDN Voice Configuration Guide

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C O N T E N T S

ISDN Features Roadmap 1

Overview of ISDN Voice Interfaces 3

Contents

Prerequisites for Configuring ISDN Voice Interfaces

Restrictions for Configuring ISDN Voice Interfaces

Information About ISDN Voice Interfaces

ISDN Media Types

Interface Cards and Network Modules

Typical ISDN Application

QSIG Protocol

Traceability of Diverted Calls

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Basic ISDN Voice-Interface Configuration 15

Contents

Prerequisites for Configuring an ISDN Voice Interface

Restrictions for Configuring an ISDN Voice Interface

Information About ISDN Voice Interfaces

How to Configure an ISDN Voice Interface

Configuring a Router for ISDN BRI Voice-Interface Support

Configuring ISDN PRI Voice-Interface Support

Configuring QSIG Support

Configuring ISDN PRI Q.931 Support

Configuration Examples for ISDN Voice Interfaces

ISDN-to-PBX and ISDN-to-PSTN: Examples

QSIG Support: Examples

Q.931-Support: Example

Additional References

Implementing Expanded Scope for Cause-Code-Initiated Call-Establishment Retries 65

Contents

Prerequisites for Expanded Scope for Cause-Code-Initiated Call Establishment Retries

Restrictions for Expanded Scope for Cause-Code-Initiated Call Establishment Retries

Information About Expanded Scope for Cause-Code-Initiated Call-Establishment Retries

How to Configure Expanded Scope for Cause-Code-Initiated Call-Establishment Retries

Configuring Expanded Scope for Cause-Code-Initiated Call-Establishment Retries

Verifying Expanded Scope for Cause-Code-Initiated Call-Establishment Retries

Troubleshooting Tips

Configuration Examples for Expanded Scope for Cause-Code-Initiated Call Establishment Retries

ISDN Interface: Example

Cause Codes: Example

Additional References

Implementing Clear Channel T3/E3 71

Contents

Prerequisites for Clear Channel T3/E3 with Integrated CSU/DSU

Restrictions for Clear Channel T3/E3 with Integrated CSU/DSU

Information About Clear Channel T3/E3 with Integrated CSU/DSU

How to Configure Clear Channel T3/E3 with Integrated CSU/DSU

Configuring Clear-Channel T3

Configuring Clear-Channel E3

Verifying Clear-Channel T3/E3

Configuration Example for Clear Channel T3/E3 with Integrated CSU/DSU

Additional References

Implementing Integrated Voice and Data WAN on T1/E1 Interfaces 93

Contents

Prerequisites for Configuring Integrated Voice and Data WAN on T1/E1 Interfaces Using the AIM-ATM-VOICE-30 Module

Restrictions for Configuring Integrated Voice and Data WAN on T1/E1 Interfaces Using the

AIM-ATM-VOICE-30 Module

Contents

Information About Integrated Voice and Data WAN on T1/E1 Interfaces Using the AIM-ATM-VOICE-30 Module

AIM-ATM-VOICE-30 Module

Integrated Voice and Data WAN

High-Complexity Voice Compression

Network Clock Source and Participation

How to Configure Integrated Voice and Data WAN on T1/E1 Interfaces Using the AIM-ATM-VOICE-30 Module

Configuring Network Clock Source and Participation

Configuring the AIM-ATM-VOICE-30 Card for High-Complexity Codecs and Time Slots

Configuring Integrated Voice and Serial Data WAN

Verifying Integrated Voice and Serial Data WAN

Configuration Examples for Integrated Voice and Data WAN on T1/E1 Interfaces Using the AIM-ATM-VOICE-30 Module

Single-Serial-Data WAN: Example

Multiple-Serial-Data WAN: Example

High-Complexity Codecs and Network Clock: Example

Additional References

Implementing ISDN GTD 119

Contents

Prerequisites for Configuring ISDN GTD for Setup Message

Restrictions for Configuring ISDN GTD for Setup Message

Information About ISDN GTD for Setup Message

Feature Design of ISDN GTD for Setup Messages

Mapping of ISDN Information Elements to GTD Parameters

How to Configure ISDN GTD for Setup Message

Configuring ISDN GTD for Setup Messages

Configuring the OLI IE to Interface with MCI Switches

Verifying ISDN GTD

Troubleshooting Tips

Configuration Examples for ISDN Generic Transparency Descriptor (GTD) for Setup Message

GTD Mapping: Example

OLI IE: Example

OLI IE and GTD: Example

Additional References

Implementing NFAS 143

Contents

Prerequisites for Configuring NFAS with D-Channel Backup

Restrictions for Configuring NFAS with D-Channel Backup

Information about NFAS

How to Configure NFAS with D-Channel Backup

Configuring NFAS on PRI Groups

Configuring a VoIP Dial Peer for NFAS Voice

Disabling a Channel or Interface

Verifying NFAS Configuration

Configuration Examples for NFAS with D-Channel Backup

POTS Dial-Peer Configuration: Example

PRI Service State: Example

Additional References

Implementing SCTP Features 155

Contents

Prerequisites for Implementing SCTP Features

Restrictions for Implementing SCTP Features

Information About SCTP and SCTP Features

SCTP Topology

IUA

Multiple NFAS Groups

Features That Use SCTP

How to Configure SCTP Features

Configuring PRI Backhaul Using the SCTP and the ISDN Q.921 User Adaptation Layer

Configuring Support for IUA with SCTP for Cisco Access Servers Feature

Troubleshooting Tips

Configuration Examples for SCTP Options

Application-Server and Application-Server-Process: Example

Application-Server and Application-Server-Process with IUA: Example

ISDN Signaling Backhaul: Example

IUA Configuration: Example

PRI Group on an MGC: Example

SCTP Configuration: Example

SCTP Migration from RLM to IUA: Example

Trunk Group Bound to an Application Server: Example

Additional References

Implementing QSIG for Tcl IVR 213

Contents

Prerequisites for Configuring QSIG for Tcl IVR 2.0

Contents

Restrictions for Configuring QSIG for Tcl IVR 2.0

Information About QSIG for Tcl IVR 2.0

How to Configure QSIG for Tcl IVR 2.0

Configuring QSIG

Configuring Supplementary Service for a POTS Dial Peer

Configuring Supplementary Service for a VoIP Dial Peer

Verifying QSIG and Supplementary Service

Configuration Example for QSIG for Tcl IVR 2.0

Additional References

Implementing T1 CAS 223

Contents

Prerequisites for Configuring T1 CAS

Restrictions for Configuring T1 CAS

Information About T1 CAS for VoIP

CAS Basics

E&M and Ground Start/FXS Protocols

How to Configure T1 CAS for VoIP

Configuring T1 CAS for Use with VoIP

Verifying T1 CAS Configuration

Configuration Example for T1 CAS for VoIP

Additional References

Implementing FCCS (NEC Fusion) 233

Contents

Prerequisites for Implementing FCCS

Restrictions for Implementing FCCS

Information About FCCS

How to Configure FCCS

Configuring VoIP QSIG

Configuring FCCS

Verifying FCCS

Additional References

Implementing the Digital J1 VIC 241

Contents

Prerequisites for Configuring the Digital J1 VIC

Restrictions for Configuring the Digital J1 VIC

Information About the Digital J1 VIC

How to Configure the Digital J1 VIC

Configuring the J1 VIC

Configuring CAS

Configuring the Clock Source

Configuring Loopback

Configuring T-CCS for a Clear-Channel Codec

Verifying Digital J1 VIC Configuration

Monitoring and Maintaining the Digital J1 VIC

Troubleshooting Tips

Configuration Examples for the Digital J1 VIC

Controller (J1): Example

Channel-Associated Signaling: Example

Clock Source: Example

Loopback: Example

Transparent Common-Channel Signaling for a Clear-Channel Codec: Example

IN D E X

ISDN Features Roadmap

This chapter contains a list of ISDN features (Cisco IOS Release 12.3 and earlier) and the location of feature documentation.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Release Features in That and Later Releases Feature Description Feature Documentation 12.3(7)T Signal ISDN B-Channel ID to Enable

Application Control of Voice Gateway Trunks

Enables the H.323 gateway to access B-channel information for all H.323 calls.

“Configuring H.323

Gateways” on page 39 of the Cisco IOS H.323

Configuration Guide 12.2(15)T Clear Channel T3/E3 with Integrated

CSU/DSU

Delivers Clear Channel service as a T3/E3 pipe.

“Implementing Clear Channel T3/E3” on page 71 of this guide

Expanded Scope for Cause-Code-Initiated Call Establishment Retries

Enables a gateway to reattempt calls upon receipt of a disconnect message from the PSTN without maintaining extra dial peers.

“Implementing Expanded Scope for

Cause-Code-Initiated

Call-Establishment Retries” on page 65 of this guide

Integrated Voice and Data WAN on T1/E1 Interfaces with the

AIM-ATM-VOICE-30 Module

Provides a voice-processing termination solution at a density of 30 VoIP or VoFR voice or fax channels without consumption of a network-module slot.

“Implementing Integrated Voice and Data WAN on T1/E1 Interfaces” on page 93 of this guide

ISDN Generic Transparency

Descriptor (GTD) for Setup Message

Provides support for mapping ISDN information elements (IEs) to corresponding GTD parameters.

“Implementing ISDN GTD” on page 119 of this guide

Support for IUA with SCTP for Cisco Access Servers

Supports ISDN user adaptation (IUA) with SCTP. Provides an alternative to existing IP-based UDP-to-Reliable Link Manager (RLM) transport between a Cisco PGW2200 and Cisco gateways.

“Implementing SCTP Features” on page 155 of this guide

12.2(11)T Non-Facility Associated Signaling (NFAS) with D-Channel Backup feature

Allows a single D channel to control multiple ISDN PRI interfaces.

“Implementing NFAS” on page 143 of this guide QSIG for Toolkit Command Language

Interactive Voice Response (Tcl IVR) 2.0

Provides transparent Q.SIG

interworking with a Tcl IVR 2.0 voice application on a Cisco gateway.

“Implementing QSIG for Tcl IVR” on page 213 of this guide T1 Channel-Associated Signaling

(CAS) for VoIP

Adds support for T1 CAS and E1 R2 signaling with the voice feature card.

“Implementing T1 CAS” on page 223 of this guide 12.2(8)T Digital J1 Voice Interface Card Provides the proper interface for

directly connecting Cisco

multiservice access routers to PBXs throughout Japan that use a J1 (2.048-Mbps TDM) interface.

“Implementing the Digital J1 VIC” on page 241 of this guide

12.1(1)T PRI Backhaul Using Stream Control Transmission Protocol (SCTP) and the ISDN Q.921 User Adaptation Layer

Provides PRI/Q.921 signaling backhaul for call-agent applications using SCTP with the IDSN user adaptation (IUA) layer.

“Implementing SCTP Features” on page 155 of this guide

12.0(7)T Fusion Call-Control Signaling (FCCS)—also known as NEC Fusion

Allows a voice network to integrate seamlessly into an IP network, enabling the addition of

voice-networking capabilities to a LAN or WAN without major network restructuring.

“Implementing FCCS (NEC Fusion)” on page 233 of this guide

Release Features in That and Later Releases Feature Description Feature Documentation

Overview of ISDN Voice Interfaces

This chapter provides an overview of ISDN Basic Rate Interface (BRI) and Primary Rate Interface (PRI) for support of voice traffic. With those ports so configured, you can do the following:

• Bypass PSTN tariffed services such as trunking and administration.

• Connect your PBXs directly to a Cisco router and route PBX station calls automatically to the WAN.

• Configure a voice interface on a Cisco router to emulate either a terminal-equipment (TE) or network-termination (NT) interface. All types of PBXs can send calls through a router and deliver those calls across the customer network.

• Configure Layer 2 operation as point-to-point (static terminal endpoint identifier [TEI]) or point-to-multipoint (automatic TEI).

Contents

• Prerequisites for Configuring ISDN Voice Interfaces, page 3

• Restrictions for Configuring ISDN Voice Interfaces, page 4

• Information About ISDN Voice Interfaces, page 4

• Additional References, page 10

Prerequisites for Configuring ISDN Voice Interfaces

• Obtain PRI or BRI service and T1 or E1 service from your service provider, as required. Ensure that the BRI lines are provisioned at the switch to support voice calls.

• Establish a working IP, Frame Relay, or ATM network. Ensure that at least one network module or WAN interface card is installed in the router to provide connection to the LAN or WAN.

• Complete your company’s dial plan.

• Establish a working telephony network based on your company’s dial plan and configure the network for real-time voice traffic. This chapter describes only a portion of the process; for further information, see the chapter “Cisco Voice Telephony.”

• Cisco 2600 series and Cisco 3600 series routers—Install digital T1 or E1 packet-voice trunk network modules, BRI voice interface cards, and other voice interface cards as required on your network.

• Cisco 7200 series routers—Install a single-port 30-channel T1/E1 high-density voice port adapter.

• Cisco MC3810 multiservice concentrators—Install the required digital voice modules (DVMs), BRI voice module (BVM), and multiflex trunk modules.

• Configure, for all platforms (as required), the following:

– Voice card and controller settings – Serial and LAN interfaces – Voice ports

– Voice dial peers

Restrictions for Configuring ISDN Voice Interfaces

ISDN Voice Interface Limitations

• Basic-net3 and basic-qsig are the only ISDN switch types currently supported for an NT interface.

• When the ISDN BRI port on the router is configured as an NT port, you must use a “rolled” cable (one with the transmit and receive leads swapped) to connect to a TE interface.

• Layer 1 can be configured only as point-to-point (that is, with one TE connected to each NT).

Automatic TEI support issues only one TEI.

QSIG Support Limitations

• Cisco 2600 series routers do not support VoATM.

• The following restrictions apply to the Cisco MC3810 multiservice concentrator:

– QSIG data calls are not supported. All calls with bearer capability indicating a nonvoice type (such as for video telephony) are rejected.

– Cisco MC3810 supports only one T1/E1 interface with direct connectivity to a private integrated services network exchange (PINX).

– Cisco MC3810 supports a maximum of 24 B channels.

– When QSIG is configured, serial port 1 does not support speeds higher than 192 kbps. This restriction assumes that the MFT is installed in slot 3 on the Cisco MC3810. If the MFT is not installed, then serial port 1 does not operate.

• The following restrictions apply to Cisco 7200 series routers:

– VoATM is not supported.

– BRI is not supported.

Information About ISDN Voice Interfaces

To configure ISDN voice interfaces, you should understand the following concepts:

• ISDN Media Types, page 5

• Interface Cards and Network Modules, page 5

• Typical ISDN Application, page 6

• QSIG Protocol, page 6

• Traceability of Diverted Calls, page 10

Overview of ISDN Voice Interfaces

Information About ISDN Voice Interfaces

ISDN Media Types

Cisco routing devices support ISDN BRI and ISDN PRI. Both media types use bearer (B) channels and data (D) channels as follows:

• ISDN BRI (referred to as “2 B + D”) uses the following:

– Two 64-kbps B channels that carry voice or data for a maximum transmission speed of 128 kbps – One 16-kbps D channel that carries signaling traffic—that is, instructions about how to handle

each of the B channels.

• ISDN PRI (referred to as “23 B + D” or “30 B + D”) uses the following:

– 23 B channels (in North America and Japan) or 30 B channels (in the rest of the world) that carry voice or data

– One 64-kbps D channel that carries signaling traffic

The D channel, in its role as signal carrier for the B channels, directs the central-office switch to send incoming calls to particular timeslots on the Cisco access server or router. It also identifies the call as a circuit-switched digital call or an analog modem call. Circuit-switched digital calls are relayed directly to the ISDN processor in the router; analog modem calls are decoded and then sent to the onboard modems.

Interface Cards and Network Modules

The VIC-2BRI-NT/TE voice interface card for the Cisco 2600 series and Cisco 3600 series routers and the BVM4-NT/TE voice module for the Cisco MC3810 multiservice concentrator enable Cisco IOS software to replicate the PSTN interface to a PBX that is compatible with European Telecommunications Standards Institute (ETSI) NET3 and QSIG switch types.

Before these cards and modules became available, if your PBXs implemented only a BRI TE interface, you had to make substantial hardware and software changes on the PBX to provide an NT interface to the router. provide an NT interface to the router. VIC-2BRI-NT/NE and BVN4-NT/NE allow you to connect ISDN PBXs and key systems to a multiservice network with minimal configuration changes on the PBX.

Typical ISDN Application

A typical application (see Figure 1) allows an enterprise customer with a large installed base of legacy telephony equipment to bypass the PSTN.

Figure 1 Typical Application Using BRI-NT/TE Voice Interface Cards or BVM4-NT/TE Voice Modules

QSIG Protocol

This section contains the following information:

• QSIG Basics, page 6

• ISDN Switch Types for Use with QSIG, page 9

QSIG Basics

QSIG is a variant of ISDN Q.921 and Q.931 ISDN D-channel signaling, for use in private integrated-services network-exchange (PINX) devices such as PBXs or key systems. Using QSIG signaling, a router can route incoming voice calls from a PINX across a WAN to a peer router, which can then transport the signaling and voice packets to another PINX.

The QSIG protocol was originally specified by European Computer Manufacturers Association (ECMA), and then adopted by European Telecommunications Standards Institute (ETSI) and the International Organization for Standardization (ISO). It is becoming the standard for PBX interoperability in Europe and North America.

35572

Router A Router B

PBX BRI NT interface

BRI TE interface WAN/IP

network

PSTN

Overview of ISDN Voice Interfaces

Information About ISDN Voice Interfaces

Table 1 identifies the ECMA standards and the OSI layer of the QSIG protocol stack to which they relate.

QSIG enables Cisco networks to emulate the functionality of the PSTN. A Cisco device routes incoming voice calls from a PINX across a WAN to a peer device, which then transports the signaling and voice packets to a second PINX (see Figure 2).

Figure 2 QSIG Signaling

The Cisco voice-packet network appears to the QSIG PBXs as a distributed transit PBX that can establish calls to any PBX, non-QSIG PBX, or other telephony endpoint served by a Cisco gateway, including non-QSIG endpoints.

QSIG messages that originate and terminate on QSIG endpoints pass transparently across the network;

the PBXs process and provision any supplementary services. When endpoints are a mix of QSIG and non-QSIG, only basic calls that do not require supplementary services are supported.

QSIG signaling provides the following benefits:

• It provides efficient and cost-effective telephony services on permanent (virtual) circuits or leased lines.

• It allows enterprise networks that include PBX networks to replace leased voice lines with a Cisco WAN.

• It eliminates the need to route connections through multiple tandem PBX hops to reach the desired destination, thereby saving bandwidth, PBX hardware, and switching power.

• It improves voice quality through the single-hop routing provided by voice switching while allowing voice to be compressed more aggressively, resulting in additional bandwidth savings.

• It supports PBX feature transparency across a WAN, permitting PBX networks to provide advanced features such as calling name and number display, camp-on/callback, network call forwarding, centralized attendant, and centralized message waiting. Usually these capabilities are available on only a single site where users are connected to the same PBX.

Table 1 QSIG Protocol Stack

OSI Layer Standard Description

7 to 4 Application mechanisms End-to-end protocols; network transparent

3 Multiple ECMA standards Standards for supplementary services and advanced network features

ECMA-165 QSIG generic functional procedures

ECMA-142/143 QSIG basic call

2 ECMA-141 Interface-dependent protocols

1 I.430 / I.431 PRI and BRI

Frame Relay

Cisco router QSIG

T1/E1 channel

Cisco router

PBX PBX

Phone Phone

31476

DLCI 200

QSIG T1/E1 channel

QSIG support enables the following:

• Digit forwarding on POTS dial peers

• On Cisco 2600 series, QSIG-switched calls over VoFR and VoIP for T1/E1 and BRI voice interface cards

• On Cisco 3600 series, QSIG-switched calls over VoFR, VoIP, and VoATM for T1/E1 and BRI voice interface cards

• On Cisco 7200 series, QSIG-switched calls over VoFR and VoIP on T1/E1 voice interface cards

• On Cisco MC3810, T1 or E1 PRI and BRI QSIG-switched calls over VoFR, VoIP, and VoATM for Cisco MC3810 digital voice modules and BRI voice module.

Figure 3 shows an example of how QSIG support can enable toll bypass.

Figure 3 QSIG Toll-Bypass Application

Branch office Cisco 2600 series or

Cisco MC3810

PBX Fax

Telephone

QSIG PINX PSTN

31475

Internet/Intranet toll bypass transit PCX

Large office Cisco 3640

Fax Telephone QSIG

PINX

Headquarters Cisco 3660

Fax Telephone

Overview of ISDN Voice Interfaces

Information About ISDN Voice Interfaces

ISDN Switch Types for Use with QSIG

You can configure QSIG at either the global configuration level or the interface configuration level. To do so requires that you know your switch type. Available types are shown in Table 2.

Table 3 lists the ISDN service-provider BRI switch types.

Table 2 ISDN Central-Office Switch Types

Country ISDN Switch Type Description

Australia basic-ts013 Australian TS013 switches

Europe basic-1tr6 German 1TR6 ISDN switches

basic-nwnet3 Norwegian NET3 ISDN switches (phase 1)

basic-net3 NET3 ISDN switches (United Kingdom and others)

vn2 French VN2 ISDN switches

vn3 French VN3 ISDN switches

Japan ntt Japanese NTT ISDN switches

New Zealand basic-nznet3 New Zealand NET3 switches

North America basic-5ess Lucent Technologies basic rate switches basic-dms100 NT DMS-100 basic rate switches basic-ni1 National ISDN-1 switches

Table 3 ISDN Service-Provider BRI Switch Types

ISDN Switch Type Description

basic-1tr6 German 1TR6 ISDN switches

basic-5ess Lucent Technologies basic rate switches basic-dms100 NT DMS-100 basic rate switches

basic-net3 NET3 (TBR3) ISDN, Norway NET3, and New Zealand NET3 switches. (This switch type covers the Euro-ISDN E-DSS1 signaling system and is

ETSI-compliant.)

basic-ni1 National ISDN-1 switches

basic-nwnet3 Norwegian NET3 ISDN switches (phase 1) basic-nznet3 New Zealand NET3 switches

basic-qsig PINX (PBX) switches with QSIG signaling in compliance with Q.931 basic-ts013 Australian TS013 switches

ntt Japanese NTT ISDN switches

vn2 French VN2 ISDN switches

vn3 French VN3 ISDN switches

Cisco platforms that support Q.931 offer both user-side and network-side switch types for ISDN call processing, providing the following benefits:

• User-side PRI enables the Cisco device to provide a standard ISDN PRI user-side interface to the PSTN.

• Network-side PRI enables the Cisco device to provide a standard ISDN PRI network-side interface via digital T1/E1 packet voice trunk network modules on Cisco 2600 series and Cisco 3600 series routers.

Traceability of Diverted Calls

European Telecommunication Standard ETSI 300 207-1 specifies that calls must be traceable if diverted.

This requires that a VoIP call, when diverted, must translate into divertingLegInformation2 instead of Redirection IE. Cisco’s ISDN implementation satisfies this requirement.

Additional References

The following sections provide references related to ISDN.

Note • In addition to the references listed below, each chapter provides additional references related to ISDN.

• Some of the products and services mentioned in this guide may have reached end of life, end of sale, or both. Details are available at http://www.cisco.com/en/US/products/prod_end_of_life.html.

Related Documents

Related Topic Document Title

AIM, ATM, and IMA • AIM-ATM, AIM-VOICE-30, and AIM-ATM-VOICE-30 on the Cisco 2600 Series and Cisco 3660 at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/12 2t8/ft_04gin.htm

• ATM Software Segmentation and Reassembly (SAR) at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limi t/122x/122xb/122xb_2/ft_t1atm.htm

• Cisco IOS Wide-Area Networking Configuration Guide, chapter on configuring ATM at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fwan_c/

wcfatm.htm

• Installing the High Performance ATM Advanced Integration Module in Cisco 2600 Series Routers at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/hw_inst/a im_inst/aim_inst.htm

Overview of ISDN Voice Interfaces

Additional References

Basic router configuration • Cisco 2600 series documentation at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/index.ht m

• Cisco 3600 series documentation at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/index.ht m

• Cisco 3700 series documentation at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/index.ht m

• Cisco AS5300 documentation at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_serv/5300/index.htm Cisco IOS command references • Cisco IOS Debug Command Reference, Release 12.3T at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123dbr/ind ex.htm

• Cisco IOS Voice Command Reference, Release 12.3T at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123tvr/ind ex.htm

Cisco IOS configuration fundamentals and examples

• Cisco IOS Configuration Fundamentals Configuration Guide at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/ffun_c/

• Cisco IOS Interface Command Reference at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/finter_r/i ndex.htm

• Cisco IOS Interface Configuration Guide at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/finter_c/

• Cisco Systems Technologies website at http://cisco.com/en/US/tech/index.html From the website, select a technology category and subsequent hierarchy of subcategories, then click Technical Documentation > Configuration Examples.

Cisco IOS Voice Configuration Library, including library preface and glossary

• Cisco IOS Voice Configuration Library at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vcl.htm Clock sources • Cisco IOS Voice, Video, and Fax Configuration Guide chapter on configuring voice

ports at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fvvfax_c/

vvfport.htm#18533

ISDN basics • Cisco IOS Release 12.2 Configuration Guides and Command References library at http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/

• Cisco IOS Release 12.3 Configuration Guides and Command References library at http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/index.ht m

ISDN cause codes • ISDN Switch Types, Codes, and Values at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/dbook/disdn.ht m

Related Topic Document Title

ISDN configuration • Cisco IOS Voice, Video, and Fax Configuration Guide at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fvvfax_c/

vvfisdn.htm

• ISDN Basic Rate Service Setup Commands at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/dial_r/drpr t1/drbri.htm

ISDN interfaces for voice • Cisco 7200 Series Port Adapter Hardware Configuration Guidelines at http://www.cisco.com/univercd/cc/td/doc/product/core/7206/port_adp/config/

• Cisco MC3810 Multiservice Concentrator Hardware Installation at

http://www.cisco.com/univercd/cc/td/doc/product/access/multicon/3810hwig/

• Quick Start Guide: Cisco MC3810 Installation and Startup at

http://www.cisco.com/univercd/cc/td/doc/product/access/multicon/3810qsg.htm

• Voice over IP for the Cisco 3600 and Cisco 2600 Series at

http://cco-rtp-1.cisco.com/univercd/cc/td/doc/product/access/nubuvoip/voip3600/ind ex.htm

ISDN network modules and interface cards

• Cisco Network Modules Hardware Installation Guide at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/hw_inst/n m_inst/nm-doc/

• Cisco WAN Interface Cards Hardware Installation Guide at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/wan_mod /

• Installing and Configuring 1-Port J1 Voice Interface Cards at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/hw_inst/h w_notes/j1vwic.htm

• Update to Cisco WAN Interface Cards Hardware Installation Guide at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/hw_inst/

wic_inst/wan_updt.htm

• Voice Network Module and Voice Interface Card Configuration Note at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/voice/471 2voic.htm

MIX module • Multiservice Interchange (MIX) for Cisco 2600 and 3600 Series Multiservice Platforms at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/12 2t4/ft_24mix.htm

RADIUS VSA configuration • RADIUS VSA Voice Implementation Guide at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_serv/vapp_dev/vsaig3.

htm

SCTP • Stream Control Transfer Protocol (SCTP) at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/12 2t8/ft_sctp2.htm

Security • Cisco IOS Security Configuration Guide at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fsecur_c/

index.htm

Related Topic Document Title

Overview of ISDN Voice Interfaces

Additional References

Standards

SS7 for voice gateways • Configuring Media Gateways for the SS7 Interconnect for Voice Gateways Solution at http://www.cisco.com/univercd/cc/td/doc/product/access/sc/rel7/soln/das22/gateway/

dascfg5.htm

Tcl IVR programming • Tcl IVR API Version 2.0 Programmer's Guide at

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_serv/vapp_dev/tclivrv2 /index.htm

Troubleshooting • Cisco IOS Debug Command Reference, Release 12.3T at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123dbr/ind ex.htm

• Cisco IOS Voice Troubleshooting and Monitoring Guide at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/

voipt_c/index.htm

• Internetwork Troubleshooting Guide at

http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/index.htm

• Voice over IP Troubleshooting and Monitoring at

http://cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/voipt_

c/index.htm

VoATM configuration • Configuring AAL2 and AAL5 for the High-Performance Advanced Integration Module on the Cisco 2600 Series at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limi t/122x/122xa/122xa_2/ft_ataim.htm

VoIP configuration • Voice over IP for the Cisco 2600/3600 Series at

http://www.cisco.com/univercd/cc/td/doc/product/access/nubuvoip/voip3600/index.h tm

• Voice over IP for the Cisco AS5300 at

http://www.cisco.com/univercd/cc/td/doc/product/access/nubuvoip/voip5300/index.h tm

• Voice over IP for the Cisco AS5800 at

http://www.cisco.com/univercd/cc/td/doc/product/access/nubuvoip/voip5800/index.h tm

WAN configuration • Cisco IOS Wide-Area Networking Command Reference at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fwan_r/i ndex.htm

• Cisco IOS Wide-Area Networking Configuration Guide at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fwan_c/

wcfatm.htm

Standards Title

014-0018-04.3D-ER CPE Requirements for MCI ISDN Primary Rate Interface, revision 4.3D, February 10, 1998

ETSI 300 207-1 Integrated Services Digital Network (ISDN): Diversion

supplementary services; Digital Subscriber Signalling System No.

one (DSS1) protocol; Part 1: Protocol specification, December 1994

Related Topic Document Title

MIBs

RFCs

Technical Assistance

TR-41459 AT&T Network ISDN Primary Rate Interface and Special

Applications Specifications, User-Network Interface, 1999

TTC JJ-20.10 to JJ-20.12 PBX

MIBs MIBs Link

• CISCO-CAS-IF-MIB.my

• CISCO-ICSUDSU-MIB

• RFC 1407 MIB

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: http://www.cisco.com/go/mibs

RFCs Title

SCTP Stream Control Transmission Protocol (SCTP), Release 2

Description Link

The Cisco Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport

Standards Title

Basic ISDN Voice-Interface Configuration

This chapter describes how to configure ISDN BRI and PRI ports to support voice traffic.

Note For more information about related Cisco IOS voice features, see the following:

• “Overview of ISDN Voice Interfaces” on page 3

• Entire Cisco IOS Voice Configuration Library—including library preface and glossary, other feature documents, and troubleshooting documentation—at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vcl.htm.

For a list of references cited in this chapter, see the “Additional References” section on page 64.

Contents

• Prerequisites for Configuring an ISDN Voice Interface, page 15

• Restrictions for Configuring an ISDN Voice Interface, page 16

• Information About ISDN Voice Interfaces, page 16

• How to Configure an ISDN Voice Interface, page 16

• Configuration Examples for ISDN Voice Interfaces, page 47

• Additional References, page 64

Prerequisites for Configuring an ISDN Voice Interface

• Perform the prerequisites that are listed in the “Prerequisites for Configuring ISDN Voice Interfaces” section on page 3.

• Obtain PRI or BRI service and T1 or E1 service from your service provider, as required. Ensure that the BRI lines are provisioned at the switch to support voice calls.

• Establish a working IP, Frame Relay, or ATM network. Ensure that at least one network module or WAN interface card is installed in the router to provide connection to the LAN or WAN.

• Complete your company’s dial plan.

• Establish a working telephony network based on your company’s dial plan and configure the network for real-time voice traffic.

• Cisco 2600 series and Cisco 3600 series—Install digital T1 or E1 packet-voice trunk network modules, BRI voice interface cards, and other voice interface cards as required on your network.

• Cisco 7200 series—Install a single-port 30-channel T1/E1 high-density voice port adapter.

• Cisco MC3810—Install the required digital voice modules (DVMs), BRI voice module (BVM), and multiflex trunk modules.

• Configure, for all platforms (as required), the following:

– Voice card and controller settings – Serial and LAN interfaces – Voice ports

– Voice dial peers

Restrictions for Configuring an ISDN Voice Interface

Restrictions are described in the “Restrictions for Configuring ISDN Voice Interfaces” section on page 4.

Information About ISDN Voice Interfaces

General information about ISDN voice interfaces is presented in the “Information About ISDN Voice Interfaces” section on page 4.

How to Configure an ISDN Voice Interface

This section contains the following procedures:

• Configuring a Router for ISDN BRI Voice-Interface Support, page 16

• Configuring ISDN PRI Voice-Interface Support, page 28

• Configuring QSIG Support, page 32

• Configuring ISDN PRI Q.931 Support, page 45

Configuring a Router for ISDN BRI Voice-Interface Support

This section contains the following procedures:

• Configure BRI NT and TE Interfaces, page 16

• Verify BRI Interfaces, page 20

Configure BRI NT and TE Interfaces

To configure BRI NT and TE interfaces, perform the following steps.

Basic ISDN Voice-Interface Configuration

How to Configure an ISDN Voice Interface

Note Set up each channel for either user side or network side.

SUMMARY STEPS

1. enable

2. configure terminal 3. isdn switch-type 4. interface bri 5. no ip address

6. isdn overlap-receiving 7. isdn twait-disable 8. isdn spid1

9. isdn spid2

10. isdn incoming-voice 11. shutdown

12. isdn layer1-emulate 13. no shutdown

14. network-clock-priority 15. line-power

16. isdn protocol-emulate 17. isdn sending-complete 18. isdn static-tei

19. isdn point-to-point-setup 20. exit

21. clear interface bri

22. Repeat for other interfaces DETAILED STEPS

Command or Action Purpose

Step 1 ^enable

Example:

Router> enable

Enters privileged EXEC mode. Enter your password when prompted.

Step 2 configure terminal

Example:

Router# configure terminal

Enters configuration mode.

Step 3 isdn switch-type switch-type

Example:

Router(config)# isdn switch-type basic-qsig

Configures the telephone-company ISDN switch type. Table 3 on page 9 shows a list of switch types.

Note The only switch types currently supported for an NT interface are basic-net3 and basic-qsig.

Step 4 Cisco MC3810

interface bri number

Other Supported Routers

interface bri slot/port

Example:

Router(config)# interface bri 1/1

Enters interface configuration mode for the specified port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card).

Step 5 no ip address

Example:

Router(config-if)# no ip address

Specifies that there is no IP address for this interface.

Step 6 isdn overlap-receiving

Example:

Router(config-if)# isdn overlap-receiving

(Optional) Activates overlap signaling to send to the destination PBX. In this mode, the interface waits for possible additional call-control information.

Step 7 isdn twait-disable

Example:

Router(config-if)# isdn twait-disable

(Optional) Delays a national ISDN BRI switch for a random length of time before activating the Layer 2 interface at switch startup. Use this command when the ISDN switch type is basic-ni1. Twait time is enabled by default.

Step 8 isdn spid1 spid-number [ldn]

Example:

Router(config-if)# isdn spid1 40855501220101

(Optional; TE only) Service-profile identifier (SPID) and optional local directory number for the B1 channel. Currently, only DMS-100 and NI-1 switch types require SPIDs. Although some switch types might support a SPID, Cisco recommends that you set up ISDN service without SPIDs.

Step 9 isdn spid2 spid-number [ldn]

Example:

Router(config-if)# isdn spid2 40855501220102

(Optional; TE only) Specifies SPID and optional local directory number for the B2 channel.

Step 10 isdn incoming-voice {voice | modem}

Example:

Router(config-if)# isdn incoming-voice voice

Configures the port to treat incoming ISDN voice calls as voice calls that are handled by either a modem or a voice DSP, as directed by the call-switching module.

Step 11 ^shutdown

Example:

Router(config-if)# shutdown

Turns off the port (before setting port emulation).

Command or Action Purpose

Basic ISDN Voice-Interface Configuration

How to Configure an ISDN Voice Interface

Step 12 isdn layer1-emulate user

or

isdn layer1-emulate network

Example:

Router(config-if)# isdn layer1-emulate user

or

Example:

Router(config-if)# isdn layer1-emulate network

(User side only) Configures Layer 1 port mode emulation and clock status for the user—that is, the TE (clock slave).

or

(Network side only) Configures Layer 1 port mode emulation and clock status for the network—that is, the NT (clock master).

Step 13 no shutdown

Example:

Router(config-if)# no shutdown

Turns on the port.

Step 14 network-clock-priority {low | high}

Example:

Router(config-if)# network-clock-priority low

(Optional; TE only) Sets priority for recovering clock signal from the network NT device for this BRI voice port. Keywords are as follows:

• high—First priority (default for BRI voice interface cards)

• low—Low priority (default for BRI voice modules) Note Do not use this command if the port is configured as NT

in Step 12.

Step 15 Cisco MC3810 Only

line-power

Example:

Router(config-if)# line-power

Turns on the power supplied from an NT-configured port to a TE device.

Step 16 isdn protocol-emulate user

or

isdn protocol-emulate network

Example:

Router(config-if)# isdn protocol-emulate user

or

Example:

Router(config-if)# isdn protocol-emulate network

(User side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the user—that is, the TE (clock master).

or

(Network side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the network—that is, the NT (clock slave).

Command or Action Purpose

Note To complete voice configuration, set up your voice ports and dial peers.

Verify BRI Interfaces

To verify BRI interfaces, perform the following steps (listed alphabetically).

SUMMARY STEPS

1. show controllers bri 2. show interfaces bri

3. show isdn {active | history}

4. show isdn {memory | status | timers}

5. show isdn status Step 17 isdn sending-complete

Example:

Router(config-if)# isdn sending-complete

(Optional) Configures the voice port to include the “Sending Complete” information element in the outgoing call-setup message. This command is used in some geographic locations, such as Hong Kong and Taiwan, where the “Sending Complete”

information element is required in the outgoing call setup message.

Step 18 isdn static-tei tei-number

Example:

Router(config-if)# isdn static-tei 0

(Optional) Configures a static ISDN Layer 2 terminal endpoint identifier (TEI).

Step 19 isdn point-to-point-setup

Example:

Router(config-if)# isdn point-to-point-setup

(Optional) Configures the ISDN port to send SETUP messages on the static TEI (point-to-point link).

Note A static TEI must be configured in order for this command to be effective.

Step 20 ^exit

Example:

Router(config-if)# exit

Exits the current mode.

Step 21 Cisco MC3810

clear interface bri number

Other Supported Routers

clear interface bri slot/port

Example:

Router# clear interface bri 1/1

(Optional) Resets the specified port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card). The interface needs to be reset if the static TEI number was configured in Step 18.

Step 22 Repeat the appropriate steps for the other BRI NT/TE interfaces.

—

Command or Action Purpose

Basic ISDN Voice-Interface Configuration

How to Configure an ISDN Voice Interface

6. show running-config 7. show voice port DETAILED STEPS

Step 1 show controllers bri number or show controllers bri slot/port

Use this command to display information about the specified BRI port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card).

Step 2 show interfaces bri

Use this command to display information about the physical attributes of the BRI B and D channels. In the output, look for the term spoofing, which indicates that the interface presents itself to the Cisco IOS software as operational.

Step 3 show isdn {active [serial-number] | history [serial-number]}

Use this command to display current (active keyword) or both historic and current (history keyword) call information for all ISDN interfaces or, optionally, a specific ISDN PRI interface (created and configured as a serial interface). Information displayed includes called number, remote node name, seconds of connect time, seconds of connect time remaining, seconds idle, and advice of charge (AOC) charging time units used during the call.

Step 4 show isdn {memory | status | timers}

Use this command to display information about memory, status, and Layer 2 and Layer 3 timers.

Step 5 show isdn status

Use this command to display the status of all ISDN interfaces, including active layers, timer information, and switch-type settings.

Step 6 show running-config

Use this command to display basic router configuration.

Step 7 show voice port [slot/port | summary]

Use this command to display information about BRI voice ports.

Examples

This section provides the following output examples:

• Sample Output for the show running-config Command, page 21

• Sample Output for the show interfaces bri Command, page 24

Sample Output for the show running-config Command

The following is sample output from a Cisco 2600 series system. Note that BRI1/0 and BRI1/1 are configured as ISDN user side and BRI2/0 and BRI2/1 are configured as ISDN network side. Table 4 describes significant fields shown in this output

Router# show running-config Building configuration...

Current configuration:

!

version 12.2

!

no service udp-small-servers service tcp-small-servers

!

hostname Router

!

username xxxx password x 11x5xx07 no ip domain-lookup

ip host Labhost 172.22.66.11 ip host Labhost2 172.22.66.12 ip name-server 172.22.66.21

! . . .

interface BRI1/0 no ip address

no ip directed-broadcast isdn switch-type basic-net3 isdn overlap-receiving isdn T306 30000 isdn skipsend-idverify isdn incoming-voice voice

!

interface BRI1/1 no ip address

no ip directed-broadcast isdn switch-type basic-net3 isdn overlap-receiving isdn T306 30000 isdn skipsend-idverify isdn incoming-voice voice

!

interface BRI2/0 no ip address

isdn switch-type basic-net3 isdn overlap-receiving

isdn protocol-emulate network isdn layer1-emulate network isdn T306 30000

isdn sending-complete isdn skipsend-idverify isdn incoming-voice voice

!

interface BRI2/1 no ip address

isdn switch-type basic-net3 isdn overlap-receiving

isdn protocol-emulate network isdn layer1-emulate network isdn T306 30000

isdn sending-complete isdn skipsend-idverify isdn incoming-voice voice

! . . .

The following is sample output from a Cisco MC3810 system. Table 4 describes significant fields shown in this output.

Basic ISDN Voice-Interface Configuration

How to Configure an ISDN Voice Interface

Router# show running-config Building configuration...

Current configuration:

!

version 12.2

service timestamps debug uptime service timestamps log uptime no service password-encryption

!

hostname Router

!

no logging console

!

network-clock base-rate 56k network-clock-select 2 T1 0

network-clock-select 3 system(SCB) network-clock-select 1 BVM

ip subnet-zero

!

isdn switch-type basic-net3 isdn voice-call-failure 0 call rsvp-sync

!

voice-card 0

!

controller T1 0 mode atm framing esf linecode b8zs

!

interface BRI1 no ip address

isdn switch-type basic-net3 isdn protocol-emulate network isdn layer1-emulate network isdn incoming-voice voice isdn T306 30000

isdn skipsend-idverify no cdp enable

!

interface BRI2 no ip address

isdn switch-type basic-net3 isdn protocol-emulate network isdn layer1-emulate network isdn incoming-voice voice isdn T306 30000

isdn skipsend-idverify no cdp enable

!

interface BRI3 no ip address shutdown

network-clock-priority low isdn switch-type basic-net3 isdn T306 30000

no cdp enable

!

interface BRI4 no ip address shutdown

network-clock-priority low isdn switch-type basic-net3

isdn T306 30000 no cdp enable

! . . .

Table 4 describes significant fields shown in these outputs.

Sample Output for the show interfaces bri Command

The following shows sample output for a Cisco 2610. Table 5 describes significant fields shown in this output.

Router# show interfaces bri 1/0

BRI3/1 is up, line protocol is up (spoofing) Hardware is Voice NT or TE BRI

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation VOICE, loopback not set

Last input 00:00:02, output never, output hang never Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/0/16 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) 5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec 26110 packets input, 104781 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 5 interface resets 0 output buffer failures, 0 output buffers swapped out 9 carrier transitions

The following shows sample output for a Cisco MC3810. Table 5 describes significant fields shown in this output.

Router# show interfaces bri 1

BRI1 is up, line protocol is up (spoofing) Hardware is BVM

Table 4 Significant Fields from the show running-config Command

Field Description

isdn T306 timer-value Value of the T306 timer, in ms.

An ISDN timer is started when a Q.931 Disconnect message with progress indicator number 8 is sent. The timer is stopped when a ISDN Release/Disconnect message is received from the other end.

The call clears on expiration of the T306 timer.

isdn T310 timer-value Value of the T310 timer, in ms.

An ISDN timer is started when a Q.931 Call Proceeding message is received. The timer is stopped when a Q.931

Alerting/Connect/Disconnect message is received from the other end. The call clears on expiration of the T310 timer.

Basic ISDN Voice-Interface Configuration

How to Configure an ISDN Voice Interface

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation HDLC, loopback not set

Last input 19:32:19, output 19:32:27, output hang never Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/1/16 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) 5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec 13282 packets input, 53486 bytes, 0 no buffer

Received 1 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 13292 packets output, 53515 bytes, 0 underruns

0 output errors, 0 collisions, 4 interface resets 0 output buffer failures, 0 output buffers swapped out 33 carrier transitions

Table 5 Significant Fields from the show interfaces bri Command

Field (in alpha order) Description

abort Illegal sequence of one bits on a serial interface. This usually indicates a clocking problem between the serial interface and the data link equipment.

BRI... is {up | down | administratively down}

Whether the interface hardware is currently active (whether line signal is present) and whether it has been taken down by an administrator.

broadcasts Total number of broadcast or multicast packets received by the interface.

BW Bandwidth of the interface in kbps.

bytes Total number of bytes, including data and media access control (MAC) encapsulation, in the error-free packets sent or received by the system.

carrier transitions Number of times that the carrier detect signal of a serial interface has changed state. Check for modem or line problems if the carrier detect line is changing state often.

collisions Number of collisions. These can occur when you have several devices connected on a multiport line.

CRC Cyclic redundancy checksum generated by the originating station or far-end device does not match the checksum calculated from the data received. On a serial link, CRCs usually indicate noise, gain hits, or other transmission problems on the data link.

DLY Delay of the interface in microseconds.

encapsulation Encapsulation method assigned to interface.

five-minute input/output rate Average number of bits and packets transmitted per second in the last 5 minutes.

frame Number of packets that are received incorrectly having a CRC error and a noninteger number of octets. On a serial line, this is usually the result of noise or other transmission problems.